Horseshoe-calk.



A. J. HERSEY.

HORSESHOE CALK.

APPLICATION man MAY26,1914.

1,210,648. Patented Jan. 2,1917.

INVENT OR. WITNESSES. Qj

"orvrrnn sira'rns PATENT orat on. P

' ARTHUR J. HERSEY, OF DULUTH, MINNESOTA, ASSIGNOR OF ONE-FOURTH T0RALPH F. MODOUGALL, OF DULUTH, MINNESOTA, AND ONE-FOURTH T0 CLARENCE M.

KEMP, OF ST. PAUL, MINNESOTA.

HORSESHOE-CALK.

Application filed May 26, 1914. Serial No. 841,173.

To all whom it may concern Be it known that I, ARTHUR'J. HERSEY, acitizen of the United States, residing at Duluth, in the county of St.Louis and State of Minnesota, have invented certain new and usefulImprovements in Horseshoe- Calks, of which the following is aspecification, reference being had therein to the accompanying drawing.

My invention relates to improvements in horseshoe calks.

The object of my invention is to provide a horseshoe calk which willgive the horse a firm grip upon the ground to prevent slipping and atthe same time providing a calk which is self-sharpening and permanentuntil the calk is entirely worn down.

Another object of my invention is to provide a horseshoe calk which canbe readily applied or removed and at the same time providing a horseshoecalk which is very economical in its manufacture and having certaindetails of structure hereinafter more fully set forth. 7

I In the accompanying drawing-Figure 1 is a bottom plan view of ahorseshoe equipped with my improved calks, one of which has been removedto show the shape of the-hole required to receive the calk. Fig. 2 is atop plan view of the improved calk. Fig. 3 is a side elevation of Fig.2. Fig. 4 is a bottom plan view of the calk.

Referring now to the drawings, 1 represents the shank of the calk, whichis of the shape shown in Fig. 2 of the drawing and is adapted to enter acorrespondingly shaped hole 2 in the shoe, the shank and hole both beingtapered correspondingly to insure a close fit and yet prevent the calkfrom being driven down to the shoulder of the blades, as will behereinafter more fully described.

The calk consists of four radially extending portions 4, 5, 6 and 7having their upper edges sharpened, as indicated at 8, and saidsharpened edges all. starting from a central common point 9, as clearlyshown in Figs. 1 and 4. These sharpened edges 8 are curved, as clearlyshown in Fig. 3, which gives a greater holding surface for the calk. Theshank l is formed of four radially extending portions 11, 12, 13 and14:, which have their outer walls slightly tapering as indicated at 15.,and said radially extending Specification of Letters Patent.

Patented Jan. 2, 1917.

portions are of a length considerably less than thatv of the main bodyof the calk, as clearly illustrated in Fig. 3 of the drawings.

The two opposite radially extending portionsa and 6 of the calk properare of a height less than that of the portions 5 and 7, as indicated at16, Fig. 3. The general transverse form throughout the length of thecalk and also that of the shank is that of a Greek cross, the fourradial portions of which form the blades and the four radial portions ofthe shank forming the portion for entering the opening 2 in the shoe andsecuring the same therein.

The two radially extending portions 4 and 6, being slightly less inheight than that of the radial portions 5 and 7, it will be seen thatwhen the calk is driven home into the opening 2 in the shoe, theradial-portions 5 and 7 will more nearly engage the lower face of theshoe, leaving the radial portions 4 and 6 a slightly greater distanceaway from the lower face of the shoe. This enables an instrument to beplaced between the lower edges of the portions 4 and 6 and the lowerface of the shoe to remove the calk when desired.

From the foregoing it will be seen that under ordinary conditions, agood substantial bearing surface is provided and since the bearing edgeis designed to be of a rounded nature easy stepping action is providedfor the horse. When the conditions are such that the horse has atendency to slip, the sharp angles formed by the blades of the calk willresist and prevent any slipping motion.

Having thus described my invention, what I claim and desire to secure byLetters Patent is:

1. The combination with a horseshoe hav ing an opening therein, of acalk having a tapered shank, said calk having a plurality of shouldersextending beyond the shank, some of'said shoulders arranged at a greaterdistance from the end of the tapered shank than the others, the saidtapered shank fitting within' the opening so that the shoulders thereonnearest the end of the tapered shank lie against the shoe, whereby theother shoulders are spaced apart from the shoe for the purposedescribed.

2. The combination with a horseshoe hay:

. ing an opening therein, of a calk having a.

tapered shank, said calk having a plurality of radial portions extendingbeyond the shank formingshoulders, someofwhich are arrangedat a greaterdistance from the end of the tapered shank than the Others, the saidtapered shank fitting Within'the opening so that the shoulders thereonnearest the end of the tapered shank lie against the shoe, Wherebyfthe.other, shoulders are spaced apart from the shoe for. the purposedescribed.

8. A horseshoe, calk having a shank portion composed oftapered radialportions to fita correspondingopeningin the. horseshoe, the calkhaving-a plurality. of radially of'the shoulders being at a greaterdistance from the end of: the shank than others and.

the shank so proportioned; with; respect to the openingyin, thehorseshoe as toqpermit the shoulders nearer the end of the shank to abutagainst the shoe and space the re 'maining shoulders therefrom, for thepurpose described.

In testimony whereof I hereunto afiix 7 7V signature in the presence oftwo Witnesses.

ARTHUR J. HERSEY. Witnesses:

R, F. MoDo GALL, S. G120. STEVENS.

Copies of this patent may be obtained. for fiveeents each, by addressingthe Gommissioner of Patents.

7 WashingtomDJ-G. I

